Untouchable Numbers Numberphile

A continuation of our video about 276 and Aliquot Sequences with Ben Sparks. See the first part at ... This video continues at and delves into so-called Featuring Matt Parker - more Parker links below. Check out Brilliant (get 20% off their premium service): ... We revisit the philosophy department and the question of whether Dr James Grime discusses highly composite Why do 220 and 284 get along so well? Dr James Grime introduces us to the world of so-called amicable

Featuring Neil Sloane from the OEIS. Check out Brilliant (get 20% off their premium service): Rubik's Cube combinations quickly lead to some unimaginably large Read this too: More links & stuff in full description ... Marcus du Sautoy discusses Gödel's Incompleteness Theorem More links & stuff in full description below ↓↓↓ Extra Footage ... Featuring Sophie Maclean - Learn more about Figgie at or search “figgie” in the App Store or Google Play ... One of the first people to stumble over imaginary

Main video is at: Featuring Matt Parker, author of Humble Pi: